it looks like she was going to hand quilt it and those are her quilting stitches. just finish going along as she did with the same looking stitches and you'll have a lovely quilt. you can go across and then down, doing 1/4 away from all the seams. or just around the print blocks and do something else in the plain ones.
binding, you can pick a color from within the quilt or match the plain squares. good luck. when you get to the binding,come back for more help if necessary. great find!